<!DOCTYPE html>
</html>
<html>
<head>
	<script src="angular.min.js"></script>
</head>
<body>
	<div ng-app="" ng-init="quantity=1;price=5">

	Quantity: <input type="number"	ng-model="quantity">
	Costs:    <input type="number" ng-model="price">

	Total in dollar: {{ quantity * price }}
	</div>

</div>
</body>